Multiorifice valve



' Lu? in 66 a:

L. C. HUFF MULTI-OHIFICE VALVE July 31,1928. 1,679,219

Filed Feb 11, 1925 Z SheetS-Sheet 1 [I'm/6 311607.- [{ynzan Paemea July 31, 1928.

UNITED STATES PATENT OFFICE.

LYMAN O. RUFF, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNIVERSAL OIL PRODUCTS COMPANY, O]? CHICAGO, ILLINOIS, A CORPORATION OF SOUTH DAKOTA.

MULTIORIFICE VALVE.

Application filed February 11, 1925. Serial No. 8,850.

This invention relates to a multi-orifice valve and refers more particularlyto liquid supply valves provided with a plurality of orifices of varying size, useful where accurate regulation and uniform feed is essential.

The specific embodiment of the present invention resides in the construction of a multi-orifice valve suitable for regulating the supply of fuel oil to a burner. Frequently,

valves employed for regulating the introduction or feed of oil clog on account of the presence in said oil of suspended pitch-like solid particles, which lodge and bu 1ld up around any projection or sharp points in the interior of the valve chamber.

In the valve of the present construct on, the arrangement is such that the oil passlng through the lines under pressure, held constant by means of a pump or the like, is caused to pass through valve openings of the tapering Venturi type, hibit no sharp spots or projectlons on which the suspended particles can lodge, thus insuring a constant and uniform flow of oil therethrough. The slidable stem is provided 1n.- termediate its length witha plurality of spaced orifices of varying slze, and with looking elements on said stem adapted to register with recesses or the llke, m a bracket attached to the valve chamber, the latter serving the purpose of locking the stem in it various positions. One or more valves may be interposed in the oil supply lines, and

where two or more are employed. in the same lines, the valve stems maybe alternately arranged to be movable in either a horizontal or vertical plane; Air or steam maybe supplied to the orifices by interposing o steam or air discharge nozzles directly adja cent the orifices in the valve stem the function of the latter being to assist the passage of the oil through the orifices and prevent be any, clogging of the orifice openings. The valves of the present lnventlon are particularl adapted for regulating the flow of fuel oil to a burner, or the suppl of charging stock to a distilling or crac ng In the drawings: Fig. 1 is a side elevational view illustratin the installation of the invention. Fig.

2 13 an enlarged cross sectional view of the valve chamber'4 of Fig. 1. v

which openings ex-' Fig. 3 is an enlarged cross sectional view of the valve chamber 16 of Fig. 1.

Referring in detail to the drawings, 1 designates the inlet for the liquid such as p11, introduced thereto under pressure, for lnstance, between 5 and pounds, held constant by means of a pump overnor or the like. Said oil may pass t rough the usual form of float check valve in housing 2 to the connecting line 3, which latter communicates with the valve chamber designated as a whole 4. As shown clearly in the enlarged view in Fig. 2, the valve chamber has lnlet 5 and outlet 6, and in this instance, 1s provided with the vertical conduit in which the valve stem 7 movable. The upper and chamber surrounding the valve stem are closed by means of the stem bushings 8, screw threaded into place and provided with the usual packing 9.

eferring now to one of the features of the present invention, the valve stem 7 is provided intermediate its length with a plurality of inwardly tapering Venturi shaped orifices or openings 10, the points of greatest diameter of each opening being substantially similar in size with the sizes of the inlet and outlet.

is adapted to be plurality of spaced at is, all being substantially of the same size at their points of greatest diameter but of difl'erent total cr0$ sectional area at their points of smallest diameter.

The stem 7 may be provided with the han dle 11 and pin orsimilar projection 12, said stem being readily movable and easily locked in any position after movement by causing the in 12 to register with one of the recesses 13 ormed in the bracket 14 which projects outwardly from the valve chambe readily apparent that the size of orifice can be accurately regulated and changes in size made very readily during operation. -T e oilv passes through the outle 6 into the connecting pipe 15 communicating with a second valve chamber designated as a whole 16. enlarged cross sectional view of this chamber 16 is shown in 'Fi 3, in which.17 designates anupwardly santing As a feature of the inv ,ventlon, there are a -o enings 10 in the stem of varying size,

lower ends of the r. By the arrangement just described, it will inlet and 18 the outlet. The valve chamber.

air or steam at 16 is provided with a central valve chamber, closed at both ends by the stem bushings 19 and packing 20. A valve stem 21,.

adapted in this instance, to be in a horizontal plane, is inserted in the valve chamber, provided intermediate its length, with the inwardly tapering orifices, or Venturi shaped passageways 22 of varying size adapted to register with the pinched or inwardly tapering inlet 17 and outlet 18. Stem 21 may be provided at one end with the handle 23, pins or studs 24 adapted to register with the recesses 25 in the bracket 26, the arrangement being such that the stem is adapted to be locked in any position by pins 24, and recesses 25. In order to assist the passage of liquids through the Venturi shaped passageways, there is tapped into the lower part of the chamber directly adajacent the inlet 17 an opening 27 discharging into chamber 28, the upper part of which is closed by a centrally apertured closure ring 29, similar to a stem bushing screw threaded into place. The lower end of chamber 28 is closed by the stem bushing 30, packing 31 and centrally apertured closure plug 32. A valvestem 33 havin handle 34 extends'into the chamber 28, sald valve stem being centrally apertured 'at 39. v

The arrangement is such that steam or air may be introduced into the chamber 28 and discharged through the valve stem duct 39 directly1 into the path of liquid being passed 'throug the valve. By adjustment of the valve stem, it is possible to discharge said any point adjacent the 'Venturi-shaped openings 22.

Referring back to Fig.- 1, the air may be introduced through pipe 40 controlled by valve 41 into the inlet 27. Intermediate its length the pipe 40 communicates by means of pipe connection 42 and valve 43 with the steam inletpipe 44, having valve 45, the

arrangement being such that either air or steam, or a combination of both may be introduced to valve chamber 16 by an obvious manipulation of valves. The steam pipe 44 has a continuation 46 beyond the valve for a purpose hereinafter described.

- The outlet 18 from valve chamber 16 discharges into connecting pipe 47, which latter discharges into nozzle 48, the arrangement bein such that there is a mixture of steam an oil in the nozzle chamber to produce atomization of the .oil, resulting in eflicient burning.

It will be understood that I do not wish to limit myself to the particular type of passageway shown, some of the broad fea-' tures of the invention being the provisioning of orifices of different sizes on the same fvalve stem; the tapering of said orifices to eliminate sharp edges; the means for readily varying the size of orifice; the means for locking the stem in any desired position vand the accuracy of registration of the orifices with the inlet and outlet. The valve stems 7 and 21 may be termed. sliding orifice rods. The air or steam of course, is maintained and introduced under a constant pressure. Either of the valves 41 or 43 controls the pressure between the two multiorifice valves and regulates the amount of oil that passes through the first valve. The flow of oil to the burner by varying the pressure in the line between the two orifice valves by the introduction of air, steam or other gas, thus eliminating the usual type of control valve, which is subject to pluggin especiall when very small quantities 0% oil are ing passed through it.

As mentioned. above, the oil enters the first orifice valve 4 at a constant pressure, and as a slightly lower pressure =1s'maintained in line 15 between the two orifice valves, a fairly large orifice can be used in valve 4.- The pressure in line 15 is regulated and maintained by admitting air or steam into the adjustable nozzle 28 of valve 16 and is usually held'at a sli htly lower pressure than the oil in line 1. his enables the use of a large orifice in valve 4 through which small particles of carbon would pass unobstructed without clogging the valve.

The orifices 22 in valve 16 can also be relatively lar steam an oil passing through same. This allows a free and unobstructed passage for carbon particles and other form matter which may be suspended in the o' Admit e because of the mixture of air or' tip is regulated One of the important features of the invention as illustrated in Fig. 1 is that it is self-cleaning, in that the liquid beingintroduced through the inlet 1 is at a constant pressure, thus keeping the check valve 2 open. The air or steam introduced through the valves 41 and 43 is also at a constant pressure. Should a slug of solid material carried in the oil plu the orifice 22 a back pressure would be bui t up, causing t e check valve to close. This ressure would be s'ufiicient to force the solid which was plugging the orifice 22 through the line 47 and nozzle 48. Further, if the nozzle 48 were plugged in a similar manner, the pressure would build up and force itout.

I claim as'my invention:.

1. In valves, the combin tion with a chamher having an inletand anoutlet each conthe juncture of the inlet and outlet with the orifices, said inlet and outlet tapering inwardl adjacent said orifices to present an unbroi locking said stem in any adjusted position, comprising a notched bracket on said valve chamber for receiving projections on said slidable stem.

2. In valves, the combination with a chamber having an inlet and an outlet each converging to a common diameter, of a slidable stem in said chamber, a plurality of orifices of difl'erent sizes in said stem, each of said en smooth surface, and means for" orifices being so formed that the edges of each orifice will coincide with the inlet and outlet whereby no shoulder is presented at the juncture of the inlet and outlet with the orifices, said inlet and outlet tapering inwardly adjacent said orifices to present an unbroken smooth surface, and means for looking said stem in any adjusted position,

and an adjustable nozzle for introducing an inert under pressure directly into the path of fiailid passlng through the orifices.

LYMAN C. HUFF. 

